import lurid from '@andyburke/lurid';
import { convert_to_words } from '@andyburke/lurid/word_bytes';

const TLDs: string[] = [
	'com',
	'org',
	'net',
	'edu',
	'gov',
	'nexus',
	'shop',
	'unreasonablylongtldname'
];

const random_byte_buffer: Uint8Array = new Uint8Array(3);
export function random_email_address(): string {
	crypto.getRandomValues(random_byte_buffer);
	const name = convert_to_words(random_byte_buffer).join('-');

	crypto.getRandomValues(random_byte_buffer);
	const domain = convert_to_words(random_byte_buffer).join('-');

	const tld = TLDs[Math.floor(Math.random() * TLDs.length)];
	return `${name}@${domain}.${tld}`;
}

export function random_username(): string {
	crypto.getRandomValues(random_byte_buffer);
	return convert_to_words(random_byte_buffer).join('-');
}

function get_a_random_array_element(values: any[]): any {
	return values[Math.floor(Math.random() * values.length)];
}

const country_codes: string[] = ['', '+1', '1', '01', '219', '40', '506', '999'];
const digits: number[] = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
const joinings: string[] = [' ', '-', '.'];
export function random_phone_number(): string {
	const country_code = get_a_random_array_element(country_codes);
	const area_code = [0, 0, 0].map((_) => get_a_random_array_element(digits)).join('');
	const central_office_code = [0, 0, 0].map((_) => get_a_random_array_element(digits)).join('');
	const subscriber_code = [0, 0, 0, 0].map((_) => get_a_random_array_element(digits)).join('');

	return `${country_code}${country_code ? get_a_random_array_element(joinings) : ''}${area_code}${
		get_a_random_array_element(joinings)
	}${central_office_code}${get_a_random_array_element(joinings)}${subscriber_code}`;
}

const DATA_DIR = lurid();
export function get_data_dir(): string {
	return Deno.env.get('TEST_DATA_STORAGE_ROOT') ?? DATA_DIR;
}